JP2009509760A - Apparatus and process for wet paint overspray separation - Google Patents

Abstract

  The present invention relates to an apparatus for separating wet paint overspray from an exhaust stream (120) containing overspray particles. The overspray particles are in the application area (108) of the painting device (100) and enter the exhaust stream (120) so that the device (126) separates the overspray from at least a portion of the exhaust stream (120). At least one separation device (168) used. It is an object of the present invention to provide an apparatus that prevents wet paint overspray from sticking to the walls of the apparatus. In accordance with the present invention, the device is divided into a plurality of sections (136, 138) under the application area (108), and at least one separation device (168) is provided in one of the sections (138). The apparatus is also used to create an air curtain on the wall that forms a flow path for the exhaust flow (120) and is disposed on the at least one flow guide element (132). One air curtain generator (200) is provided.

Description

  The present invention relates to an apparatus for separating wet paint overspray from an exhaust stream containing excess spray particles, the excess spray particles entering the exhaust stream entering the application region of the paint assembly, the apparatus from at least a portion of the exhaust stream. , Comprising at least one separating device for separating excess spray.

  Such an apparatus is known, for example, from the patent document DE 42 11 465 C2 and is used in assemblies for workpiece painting, in particular for body spray painting, where an air flow is generated through the application area of the assembly, Excess wet paint is discharged from the application area.

  The purpose of forming the basis of the present invention is to provide a device of the type described above, in which the wall surface of the device is prevented from becoming clogged by wet paint overspray.

  This object is achieved according to the invention by a device having the features of the preamble of claim 1, according to which the device is divided into a plurality of sections by at least one flow guide element and is applied. Comprising a flow chamber disposed below the region, wherein one of the sections is provided with at least one separation device, the device delimiting the flow path of the exhaust flow and on the at least one flow guide element At least one air curtain generating device for generating a wall surface air curtain arranged.

  The solution according to the invention is that the generated air curtain prevents the exhaust stream containing wet paint overspray from traveling to the wall surface protected by the air curtain, which causes the wet paint overspray from It is based on the concept that it is prevented from adhering to the surface.

  In this way, in particular, surfaces exposed to exhaust streams containing wet paint overspray can be permanently prevented from depositing wet paint overspray.

  The amount of air supplied to the entire exhaust stream by one or more air curtain generators preferably corresponds to about 10% to 30% of the amount of exhaust emanating from the application area.

  The cooled air has a higher density than the exhaust emanating from the application area and therefore descends towards the wall surface to be protected, so it is particularly preferred if the air supplied to the air curtain generator is cooled.

  For example, fresh air can be supplied by an air curtain generator.

  Alternatively, the cleaned (or cleaned) exhaust can be supplied from the air curtain generator.

  In a preferred configuration of the invention, the wall surface protected by the air curtain is oriented substantially horizontally.

  The wall surface protected by the air curtain may be a flow guide surface that delimits the contraction in the lateral direction, particularly in the flow path of the exhaust flow from the application area to the separation device.

  In this case, the central flow direction of the air curtain is preferably directed toward the contraction, whereby excess spray particles are directed through the air curtain toward the contraction and through the contraction toward the separation device.

  In particular, the constriction delimited by the flow guide surface may be at least partially closable by the closure device.

  The separation device can in particular comprise a renewable surface filter, i.e. a filter, on which the wet paint overspray carried by the exhaust stream is deposited, preferably during the routine operation of the device. It can be cleaned (or cleaned) to remove paint overspray deposited thereon.

  In order to facilitate cleaning (cleaning) of the renewable surface filter, the renewable surface filter may have a barrier layer with a precoat material that prevents clogging of the filter surface. This barrier layer can be renewed by a pre-coating operation after cleaning the surface filter and can be strengthened by an intermediate pre-coating operation during the cleaning operation.

  A preferred configuration of the device according to the invention comprises at least one closing device, whereby the flow path of the exhaust flow from the application area to the separation device can be intermittent and at least partially closed.

  The amount of wet paint overspray transported from the application area to the separator during the cleaning and pre-coating operations, and the amount of precoat material that travels from the area of the separator to the application area during these operations are also described above. During the pre-coating operation, it is at least reduced by at least partially closing the exhaust flow path between the application area and the separation device.

  Furthermore, the closure device can also be operated in the event of a failure in order to prevent contamination of the painting object in the application area.

  Since the flow path of the exhaust flow from the application area to the separation device is at least partly closed during the cleaning and / or pre-coating operation, this flow path has a relatively large flowable cross section, except during the closing phase. It can comprise so that it may have. In particular, it is not necessary to provide a high flow rate (greater than about 2 m / s) in the particularly narrow contraction in the flow path of the exhaust flow from the coating region to the separation device.

  In a preferred configuration of the invention, the closure device comprises at least one closure element and a movement device, whereby the closure element is movable to enter the exhaust flow passage and is in a closed position, Exit from the exhaust flow path to the open position.

  The closure element can be configured, for example, to be substantially airtight.

  In this case, preferably, the flow path of the exhaust flow from the application area to the separation device is only partially closed during the cleaning and / or precoating operation, so that at least one gap always remains there. Through which the exhaust flow (which has been reduced in the closing phase) can be allowed to proceed from the application area to the separation device. Nevertheless, in this configuration, the amount of overspray that is transported from the application area to the separator or the amount of precoat material that is transported from the separator to the application area is due to the reduced exhaust flow through the closure. , Considerably reduced.

  In particular, the closure element can comprise a sheet metal plate.

  In this case, the closure element is preferably configured to allow the closure element to be in the closed position, which covers up to about 80% of the cross section through which the exhaust flow flows when the closure element is in the open position.

  Furthermore, in the event of a malfunction, the closure element can be further closed, in which the exhaust flow path from the application area to the separation device can be completely closed by the closure element.

  As an alternative to the hermetic closure element, the closure element can also be permeable and comprise a permeable filter element.

  The filter element filters out wet paint overspray and precoat material from the air flow passing through the filter element when the closure element is in the closed position so that both wet paint overspray and precoat material are closed. When in position, it cannot pass through the closure element.

  When a permeable closure element is used, the flow path of the exhaust flow from the application area to the separation device is preferably completely closed by the closure element in the closed position.

  In a preferred configuration of the invention, the closure element comprises a support structure on which the filter element is retained.

  In particular, the filter element can be held by a clamping device of the support structure. In this way, the filter element and / or precoat material containing the wet paint overspray can be easily removed from the support structure and replaced with a new filter element.

  In order to allow air to pass through the closure element, the support structure can have air passages arranged in a honeycomb configuration.

  A particularly stable closure element is obtained if the support structure is formed from a metallic material.

  The moving means for moving the closing element from the open position to the closed position and also back to the open position preferably comprises at least one guide rail for guiding the closing element.

  Furthermore, the movement device can comprise, for example, an electrical, hydraulic (hydraulic) hydraulic or pneumatic closure element drive mechanism.

  In a special configuration of the moving device, the moving device comprises in particular a circulating transport element which is a chain or a toothed belt.

  It is particularly preferred if the closure element is configured to be accessible by the operator when in the closed position. In this case, the accessible closure element can serve in particular as a starting point for carrying out maintenance and / or repair work on the transport device that transports the object to be painted through the application area. In this case, the passage grid that normally defines the area of the paint cabin at the bottom can be omitted.

  When the object to be coated is transported by the transport device through the application area, preferably the vertical distance between the upper side of the closing device in the closed position and the lower side of the object to be coated reaches a maximum of about 2 m. Thereby, the transport device can be easily accessed by an operator standing on the closure element.

  In order to hold the closure element in its closed position, in a particularly stable manner, the device preferably comprises a support element against which the closure element is supported in the closed position.

  Such a support element can be configured as a vertical partition wall, in particular in the flow chamber of the device, with respect to the upper edge on which the closure element is supported.

  In order to protect the closure element from contamination by wet paint overspray or by the precoat material when not in the closure phase, the closure element is preferably arranged below the flow guide element of the device in its open position. .

  The device according to the invention preferably comprises at least one renewable surface filter.

  In order to provide a barrier layer that prevents wet paint overspray from adhering to the boundary walls of the regenerative surface filter and / or the exhaust flow path, the device preferably pre-coats the material of the closure device. At least one precoat supply means for discharging downstream of the exhaust flow is provided.

  In this case, the discharge of the precoat material into the exhaust flow preferably occurs when the closure device at least partially closes the flow path of the exhaust flow, whereby the closure device causes the precoat material to be in the coating assembly. Prevent entry into the application area.

  In a special configuration of the device according to the invention, the flow path of the exhaust flow from the closure device to the separation device has at least one constricted region. The increased flow rate of the exhaust flow in the contracted region is that the precoat material actually exits the section of the exhaust flow channel that is contracted and located downstream of the region with respect to the flow direction of the exhaust flow to the closure device. It means you can't. Thus, cleaning (cleaning) and pre-coating operations are performed in a contracted area with the exhaust flow path from the application area to the separation device at least partially unclosed during these operations. In the section of the channel located downstream of In this case, conversely, when a pre-coating operation is performed in the section of the exhaust flow path located between the closure device and the contracted area, the exhaust flow path from the application area to the separator is closed. It is sufficient that the device is at least partially closed.

  The central flow direction of the exhaust flow is preferably oriented substantially horizontally while passing through the contracted region.

  The apparatus preferably comprises at least one precoat supply means for discharging the precoat material into the exhaust stream downstream of the contracted area. As already mentioned, the closing device does not have to be moved to the closed position while such a precoat supply means is being operated.

  In a preferred arrangement of the device, the device is formed with at least one receiving container for the precoat material used. By collecting the used precoat material in such a receiving container, the used precoat material, i.e. the precoat material mixed with the wet paint overspray, is precoated on the boundary wall of the filter element or the flow path of the exhaust flow. Can be supplied for reuse.

  Such a receiving container is preferably arranged below the separating device and / or below the closing device.

  The receiving container can in particular be connected to the precoat storage container by a precoat discharge duct which can transfer the used precoat material from the receiving container to such a precoat storage container.

  The at least one precoat containment can be connected to at least one precoat supply means for discharging the precoat material into the exhaust stream.

  The precoat container can selectively discharge a precoat material without or containing wet paint to the precoat supply means.

  The spent precoat material collected in the receiving container is particularly suitable if the device comprises at least one compressed air nozzle capable of transporting the precoat material contained in the receiving container from the receiving container into the flow path of the exhaust flow. Can be supplied for reuse in a simple way.

  Special energy-saving operation of the painting assembly is possible if the device has a circulating air circuit in which the exhaust stream separating the wet paint overspray is at least partly re-supplied to the application area.

  Claim 39 is a painting assembly of an object, in particular a vehicle body, at least one device for separating wet paint overspray from at least one paint cabin and an exhaust stream containing overspray particles. Is referred to.

  A further object that forms the basis of the present invention is to provide a method for separating wet paint overspray from an exhaust stream containing overspray particles, where the overspray particles are exhausted in the application area of the paint assembly. As it flows into the stream, clogging of the device wall surface due to wet paint overspray is prevented.

This object is achieved by a method comprising the following method steps.
Separating the overspray from at least a portion of the exhaust stream by means of a separation device disposed in a section of the flow chamber disposed below the application area and divided into a plurality of sections by at least one flow guide element; ,
Generating an air curtain at the wall surface delimited by the flow path of the exhaust flow and disposed on the at least one flow guide element;

  Additional features and advantages of the invention are the subject matter of the following description and exemplary embodiments.

  In all the drawings, the same elements or elements having equivalent functions are given the same reference numerals.

  The assembly shown in FIGS. 1-10 is generally given the reference numeral 100, but is for spray painting the body 102 and is represented purely for illustration purposes only. Thus, the vehicle body 102 is provided with a transport device 104 which can be moved in the transport direction 106 through the coating cabin application area 108, which is given the reference numeral 110 as a whole.

  The transport device 104 can be configured, for example, as a reverse swivel conveyor or a reverse monorail conveyor.

  In particular, the transport device 104 can be composed of two parts, best seen in FIGS. 1, 3 and 4, extending parallel in the transport direction 106 and spaced from each other in a horizontal direction perpendicular to the transport direction 106. Two conveyor strands 104a and 104b can be provided.

  The application area 108 is inside the paint cabin 110 and on both sides of the transport device 104 by its respective cabin wall 114 in its horizontal transverse direction extending perpendicular to the transport direction 106 corresponding to the longitudinal direction of the paint cabin 110. A range is defined.

  For example, a spray painting device 116 (see FIGS. 1 to 4) in the form of a painting robot is located on either side of the transport device 104 in the painting cabin 110.

  The air flow passing in a substantially vertical direction from the upper side to the lower side of the application area 108 is indicated by the arrow 119 in FIG. 1, but is generated by the circulating air circuit 118 schematically shown in FIG. Is done.

  The air flow captures paint overspray in the form of overspray particles in the application area 108.

  In this case, the term “particles” includes both solid and liquid particles, in particular droplets.

  When wet paint is used for painting in assembly 100, the wet paint overspray consists of paint droplets.

  Most of the overspray particles have a maximum dimension in the range of about 1 μm to about 100 μm.

  The exhaust stream indicated by the arrow 120 exits the paint cabin 110 downward and exhausts the wet paint overspray 120 disposed below the application area 108, generally designated by reference numeral 126. Enter the device to separate from.

  The apparatus 126 includes a substantially cubic flow chamber 128 that extends beyond the entire length of the paint cabin 110 in the transport direction 106 and includes a lateral cabin wall 114 of the paint cabin 110 and A substantially aligned vertical sidewall 130 delimits the lateral direction 112 of the paint cabin 110 so that the flow chamber 128 has substantially the same horizontal cross-sectional area as the paint cabin 110. The coating cabin 110 is substantially completely disposed in the vertical projection of the floor space.

  The flow chamber 128 is divided into an upper section 136 and a lower section 138 by a flow guide element 132, which in this example embodiment is configured as a flow baffle plate 134 that is oriented substantially horizontally.

  The upper section 136 and the lower section 138 of the flow chamber 128 are connected to each other by a constriction 140, which is in the form of a gap between opposing free edges of the flow guide element 132 and passes through the flow chamber 128. A narrow portion is formed in the flow path of the exhaust flow.

  In this case, the horizontal cross-sectional area of the contraction 140 is about 35% to about 50% of the horizontal cross-sectional area of the flow chamber 128 at the level of the contraction 140.

  The flow velocity of the exhaust flow 120 in the range of the contraction 140 is about 0.6 m / s to about 2 m / s.

  The lower section 138 of the flow chamber 128 is divided into a left subsection 138 a and a right subsection 138 b by a vertical partition wall 142 parallel to the transport direction 106.

  Each precoat supply means 144 in the form of a precoat (prepaint) lance (protrusion) extending in the transport direction 106 is integrated into a respective edge of the flow guide element 132 on the contraction side.

  Each pre-coating lance has, for example, a diameter of about 30 mm and is provided with a plurality of atomizer nozzles, the atomizer nozzles being arranged in the longitudinal direction of the pre-coating lance at intervals of about 50 mm to about 100 mm, and from about 3 mm It has a pore size in the range of about 15 mm.

  These atomizer nozzles of the pre-coating lance discharge the pre-coating material in the form of a spray mist into the exhaust stream 120 at intervals.

  Each of the precoat supply means 144 is connected to the precoat storage container 148 by one or more precoat supply ducts 146, and the precoat storage container 148 stores the precoat material in a flowable state.

  In principle, any material that can absorb the liquid component of the wet paint overspray can be used as the precoat material.

  In particular, lime, rock meal, aluminum silicate, aluminum oxide, silicon oxide, powdered paint, and the like are considered as precoat materials, for example.

  The precoat material is composed of a plurality of precoat particles, for example, having an average diameter ranging from about 10 μm to about 100 μm.

  One construction of the precoat container 148 is shown in detail in FIG.

  A storage chamber 150 is located inside the precoat storage container 148, and the storage chamber 150 narrows downward like a funnel, and is a fluid of a flowable precoat material disposed on the compressed air chamber 154. A floor 152 is included.

  The precoat material is conveyed out of the storage chamber 150 of the precoat storage container 148 by an injector 156 whose details are shown in FIG.

  The injector 156 has a T-shaped cross-sectional shape, and includes a compressed air connection portion 158, a connection portion 160 for the precoat supply duct 146, and a lance jet portion 162 protruding to the fluid bed 152 of the storage chamber 150. Yes.

  To transport the precoat material, for example, compressed air at a pressure of about 5 bar flows through the injector 156 from its compressed air connection 158 toward the connection 160 for the precoat supply duct 146. This compressed air flow is indicated by arrow 164 in FIG.

  This compressed air stream provides a suction effect, so that fluidized precoat material is drawn from the fluid bed 152 through the lance jet 162 into the injector 156 and through the connection 160 into the precoat supply duct 146. .

  The flow of precoat material through the injector 156 is indicated by arrow 166 in FIG.

  Each separator 168 that separates wet paint overspray from the exhaust stream 120 is provided in subsections 138 a, 138 b of the lower section 138 of the flow chamber 128 on either side of the contraction 140. Separators 168 each include a plurality of renewable surface filters 170 that are disposed on two opposing vertical sidewalls 130 of flow chamber 128 and are equally spaced from one another in transport direction 106. , Having a filter element 172 and projecting into the lower section 138 of the flow chamber 128 (see in particular FIGS. 1, 2 and 4).

  Each renewable surface filter 170 includes a hollow base body on which, for example, a generally flat filter element 172 is held.

  The filter element 172 can be configured, for example, as a plate made from sintered polyethylene, and a polytetrafluoroethylene (PTFE) membrane is provided on its outer surface.

  The PTFE coating increases the degree of filtration of the surface filter 170 (ie, reduces its permeability), and further prevents permanent adhesion of wet paint overspray deposited from the exhaust stream 120. Function.

  Both the base material of the filter element 172 and its PTFE coating are porous so that exhaust can pass through the holes and enter the interior of each filter element 172.

  In order to prevent clogging of the filter surface, they are provided with a barrier layer of precoat material discharged into the exhaust stream.

  During operation of the device 126, this barrier layer is formed on the filter surface by the deposition of precoat material discharged into the exhaust stream 120 to prevent clogging on the surface as a result of non-moist overspray to adhere. To do.

  Precoat material from the exhaust stream 120 also deposits on the boundary walls of the lower section 138 of the flow chamber 128 where it prevents wet paint overspray from adhering.

  The exhaust stream 120 passes over the filter surface of the filter element 172 of the renewable surface filter 170, and both the precoat material and wet paint overspray that have been deposited accumulate on the filter surface and pass through the porous filter surface. , Enters the interior of the filter element 172 connected to the cavity inside the base body 174 of each surface filter 170.

  The cleaned exhaust stream 120 thus passes through the base body 174 and enters the respective exhaust pipe 176, which passes from each renewable surface filter 170 next to the vertical sidewall 130 of the flow chamber 128. The exhaust duct 178 extends in the direction and extends parallel to the transport direction 106.

  As can be seen from the schematic representation of FIG. 10, the exhaust cleaned with wet paint overspray exits the two exhaust ducts 178, passes through the exhaust collection duct 180, reaches the recirculation fan 182 and from there, The purified exhaust gas is supplied to an air chamber 188 arranged above the application region 108, a so-called space, via a cooling battery 184 and a supply duct 186.

  From the air chamber 188, the cleaned exhaust gas returns to the application region 108 through the filter cover 190.

  An exhaust duct 192 that can be completely or partially closed by the exhaust valve 194 branches off from the supply duct 186.

  A portion of the cleaned exhaust stream that passes through the exhaust valve 194 and the exhaust duct 192 is discharged to the outside world (eg, via an exhaust pipe).

  This portion of the exhaust stream discharged to the outside world is replaced with fresh air and supplied to the inlet system 196 via the fresh air supply duct 198.

  Fresh air from the inlet system 196 is supplied to the flow chamber 128 by two air curtain generators 200 connected to the inlet system 196 by respective inlet ducts 202.

  As best seen in FIG. 1, each air curtain generator 200 extends in the transport direction and is supplied with intake air from the inlet system 196 via the inlet duct 202 and through the air gap 206 to the top of the flow chamber 128. Each inlet chamber 204 is open to a section 136 and this gap 206 extends in the transport direction and has a vertical extension, for example in the range of about 15 cm to about 50 cm. .

  The air gaps 206 in the inlet chamber 204 are each arranged slightly above one of the flow guide elements 132, so that from the substantially horizontal inlet chamber 204 along the flow guide element 132, An air curtain is formed as a result of the inflow of intake air into the upper flow chamber 128, and the air curtain is directed from the air curtain generator 200 to the contraction 140 between the flow guide elements 132, thereby causing excess wet paint. The exhaust stream 120 containing the spray is prevented from exiting the application area 108 and over the flow guide element 132, and wet paint overspray from the exhaust stream 120 is prevented from depositing on the upper side of the flow guide element 132. The

  In the flow guide element 132, the central flow direction of air in the lateral air curtain configuration generated by the air curtain generator 200 is illustrated by arrows 208 in FIG.

  Since the air flow in the lateral air curtain configuration is directed toward the contraction 140 between the flow guide elements 132, any excess spray particles deposited on the upper side of the flow guide element 132 are moved toward the contraction 140. There, it is carried by the exhaust stream 120 and enters the lower section 138 of the flow chamber.

  The amount of air per unit time supplied to the inside of the flow chamber 128 by one of the air curtain generators 200 is about 5% of the amount of air per unit time included in the exhaust flow 120 from the application region 108. It will be about 15%.

  The inlet system 196 includes a cooling battery (not shown) so that the air supplied to the air curtain generator 200 is cooled and cooler than the exhaust stream 120 flowing out of the application region 108 to generate an air curtain. The air supplied by the device 200 will drop in the flow chamber 128, ie towards the surface of the flow guide element 132 to be protected.

  This cooled intake air further mixes with the exhaust stream 120 from the application region 108 as it flows through the lower section 138 of the flow chamber 128, the exhaust duct 178, and the exhaust collection duct 180. Thereby, the warming of the cleaned exhaust that is supplied again to the application area 108 via the supply duct 186 will be partially compensated by the recirculation fan 182.

  This compensation as a result of the air supplied by the air curtain generator 200 is supplemented by the cooling of the air exiting the recirculation fan 182 by the cooling battery 184.

  Accordingly, most of the air directed through the application region 108 is applied to the application region 108, the flow chamber 128, the exhaust duct 178, the exhaust collection duct 180, the recirculation fan 182, the supply duct 186, and the application The steady heating of the air led to the recirculation air circuit 118 with the air chamber 188 above the area 108 is guided by the supply of fresh air by the air curtain generator 200 and the cooling. This is prevented by cooling by the battery 184.

  The average air velocity in the exhaust collection duct 180 and supply duct 186 is in the range of about 6 m / s to about 12 m / s.

  The separation of the wet paint overspray from the exhaust stream by the regenerative surface filter 170 is dry, i.e. without cleaning with a clean fluid, so that the air directed to the recirculation air duct 118 is free of the separation of the wet paint overspray. There is no moisture in between, thereby eliminating the need for any device to remove the moisture in the air directed to the recirculation air circuit 118.

  Furthermore, no device is required to separate the wet paint overspray from the cleaning fluid used for cleaning.

  Renewable surface filter 170 is cleaned by compressed air pulses at special time intervals when its wet paint overspray load reaches a certain level.

  Cleaning (cleaning) can be performed, for example, from 1 to 6 times for every 8 hours of operation shift and about every 1 to 8 hours (depending on the increase in pressure loss in the surface filter 170).

  The required compressed air pulse is placed on the base body 174 of each renewable surface filter 170 and passes through the interior of each base body 174 and leads from the pulsation unit 210 to the interior of the filter element 172. Is generated by a pulsation unit 210 capable of supplying compressed air pulses to the

  From inside the filter element 172, the compressed air pulse passes through the porous filter surface and enters the outer region of the filter element 172, where a barrier layer of precoat material formed on the filter surface and deposited thereon. The wet paint overspray is pulled away from the filter surface, thereby returning the filter surface to its cleaned initial state.

  The compressed air stored in the pulsation unit 210 is replenished from the on-site compressed air supply network by a compressed air supply duct (not shown).

  After cleaning, a new barrier layer is created on the filter surface by adding the precoat material to the exhaust stream 120 by the precoat supply means 144, and the barrier layer can be composed of a 100% no paint precoat material or a wet paint containing precoat material. .

  The material, including wet paint, cleaned from the filter surface of the renewable surface filter 170 is applied to the lower section 138 of the flow chamber 128 such that the upwardly facing opening 214 substantially covers the entire horizontal cross section of the flow chamber 128. A plurality of precoat receiving containers 212 are arranged. In this way, all material removed from the surface filter 170 by cleaning enters the precoat receiving container 212 with the precoat and excess spray material already separated from the exhaust stream 120 before reaching the surface filter 170.

  Each precoat receiving container 212 includes an upper portion 216 that is funnel-shaped and narrows downward, and a lower portion 218 that is generally cubic.

  The side walls of the upper portion 216 of the precoat receiving container 212 are funnel-shaped and inclined toward each other and surround each other with a funnel angle of about 50 ° to about 70 °.

  Close to the upper opening 214, each upper part 216 of the precoat receiving container 212 is provided with a compressed air lance 220 across the upper part 216, by which the material located in the upper part 216 of the precoat receiving container 212 is provided. Can be exposed to a compressed air pulse, resulting in a spiral.

  The spiraled material can rise through the opening 214 and can be deposited, for example, on the filter surface of the renewable surface filter 170 or on the vertical partition wall 142, which surface or wall is coated with a precoat material. To protect against the deposition of wet paint overspray from the exhaust stream 120.

  From the lower side 218 of the precoat receiving container 212, the material contained therein, that is, the mixture of the precoat material and the wet paint overspray, can be transported through the suction pipe 222, respectively, and the precoat suction pump 223 is arranged. Into one of the precoat containment vessels 148 from which it is fed from there through precoat supply duct 146 for reuse as precoat material.

  In addition to the precoat storage container 148 that supplies precoat material containing wet paint to the precoat supply duct 146, the device 126 is also not connected to the precoat receiving container 212, but the precoat material without wet paint in the precoat supply duct 146. Can be further provided with a precoat containment vessel filled with a precoat material without wet paint.

  This intermediate pre-coating of the surface filter 170 and the vertical partition wall 142 can be performed, for example, at intervals of about 15 minutes to about 1 hour.

  During these intermediate pre-coating operations, or during a cleaning operation and subsequent pre-coating of the surface filter 170, to prevent the pre-coat material from entering the application region 108 through the shrinkage 140 or wet paint overspray To prevent the surface 140 from reaching the surface filter 170 through the constriction 140, the constriction 140 can be operated by two closure devices 224, one of which is shown in detail in FIGS. Is closed.

  The left closure device 224a (closed in FIG. 1) functions to close the left section 140a of the constriction 140, and one of the ranges is defined (or delimited) by the right edge of the left flow guide element 132a, The other is defined (or delimited) by the upper edge of the vertical partition wall 142.

  The right closure device 224b (open in FIG. 1) functions to close the right section 140b of the constriction 140, with one of the ranges defined by the left edge of the right flow guide element 132b, the other being the vertical partition 142 Defined by the upper side of the.

  Each closure device 224 includes a support structure 228 made of a metallic material and a closure element 226 having a filter element 230 held on the support structure 228 by a clamping action.

  As best seen in FIGS. 5 and 6, the support structure 228 comprises a substantially flat plate 232 provided with a pattern of air passages 234 arranged in a honeycomb configuration.

  The plate 232 can in particular be formed from a galvanized steel material or a special steel material.

  The material thickness of the plate 232 is about 4 mm, for example.

  The length of the air passage 234 in the lateral direction 112 is, for example, about 40 mm. The length of the air passage 234 in the transport direction 106 is about 80 mm, for example.

  The generally square air passages 234 are arranged in a plurality of successive rows in the lateral direction 112, with one row of air passages 234 being offset with respect to two adjacent rows of air passages 234. For example, it is offset by about half the length of the air passage 234 in the transport direction 106.

  The air passages 234 in the plate 232 are separated from each other by webs 236 located therebetween and extending in the transverse direction 112 or the transport direction 106 and each having a width of, for example, about 8 mm.

  On the lateral edges, the plate 232 is provided with respective edge regions 240, which are not provided with air passages and have a width of, for example, about 30 mm.

  A filter element 230 having the shape of a filter mat is located on the plate 232 and is supported on the web 236 of the plate 232 and on the edge region 240 of the plate 232.

  The filter element 230 can be configured, for example, as a glass fiber mat, is air permeable, and has a thickness of, for example, about 50 mm to about 100 mm.

The weight per unit area of the filter element 230 reaches, for example, from about 220 g / m ² to about 350 g / m ² .

  Suitable filter elements 230 are for example sold under the name “Farbnebelabscheider (Paint Mist Arrestor) Typ PS50” or “Farbnebelabscheider (Paint Mist Arrestor) Type PS100” from Freudenberg Vliesstoffe KG, 69465 Weinheim, Germany (Gearmany). .

  A permeable filter element 230 and a plate 232 having an air passage 234 allows air to pass through the closure element 226, but precoat material carried by the air, or wet paint overspray carried thereby, is blocked by the filter element 230, As a result, neither the precoat material nor the wet paint overspray can pass through the closure element 226.

  In order to secure the filter element 230 to the support structure 228 by clamping action, the closure element 226 includes a plurality of clamping means 242 disposed on the angled frame profile 244, each on the plate 232 and the filter element 230. Vertical legs 246 and horizontal legs 256, which extend along the edges of the plate 232.

  Each of these clamping means 242 includes an angle element 248 having a horizontal leg 250 and a vertical leg 252, which is secured to the edge region 240 of the plate 232, and the vertical leg 252 has a vertical slot. Provided (not clear from the representation in FIG. 6).

  A plurality of, for example, two clamping screws 254 are screwed into and engage the holes in the frame profile 244 so that the frame profile 244 is perpendicular to the vertical leg 252 of the angle element 248. And can be tightened at a desired position by tightening the tightening screw 254.

  When the frame profile 244 is clamped in the lower clamping position with respect to the angle element 248, the horizontal legs 256 of the frame profile 244 apply pressure on the edge region of the filter element 230, thereby causing the filter element 230 to move to the frame profile 244. And tightly clamped between the plates 232 of the support structure 228.

  The tightening of the filter element 230 to the support structure 228 can be released to replace the filter element 230 with a new filter element 230 after a certain period of operation.

  Due to the moving device 258 shown in FIG. 7, the closing element 226 is moved from the open position (shown in phantom in FIG. 7) where the closing element 226 is located below the flow guide element 132. The associated section 140a of the contraction 140 can be moved to a closed position (shown in solid lines in FIG. 7).

  The moving device 258 includes an electric motor 260 that can drive the drive gear 262 for rotational movement, a toothed belt 266 disposed around the drive gear 262, a return gear 264 (and possibly another not shown). Return gear). Two receiving plates 268 are fixed to the upper running part 280 of the toothed belt 266 at a distance from each other in the longitudinal direction of the toothed belt, and on the frame profile 244 of the closure element 226 in the transport direction. A protruding generally cylindrical journal 270 is disposed and rotates about its horizontal axis.

  The toothed belt 266 follows the course of the guide rail 272, which includes a lower section 274 in which the closing element 226 is guided laterally in the open position, and a lateral guide in which the closing element 226 is closed in the closed position. And a central section 278 that is inclined with respect to the horizontal and connects the upper section 276 to the lower section 274.

  When the closure element 226 is in the open position (shown in broken lines in FIG. 7), the closure element 226 is driven from this open position to the closed position (shown in solid lines in FIG. 7). It can be moved by an electric motor 260 that rotates the gear 262 clockwise, so that the upper running part 280 of the toothed belt 266 moves to the right together with the receiving plate 268 fixed thereon and rotates on the receiving plate 268. As such, the closure element 226 held by the journal 270 is pulled to the right by the receiving plate 268. In this case, the closure element 226 is guided on the guide rail 272 so that with the closing movement, the closure element 226 reaches the central section 278 of the guide rail 272 until it reaches the closed position. 276, in its closed position, the closure element 226 completely covers the section 140a of the contraction 140 so that its rear edge touches the front edge of the flow guide element 132 and its front edge is the vertical partition. Located above 142, the closure element 226 is thereby supported at the bottom by a vertical partition wall 142 in the closed position.

  The metal support structure 228, the guide of the closure element 226 on the guide rail 272, and the vertical partition wall 142, for example, to perform maintenance or repair work on the transport device 104 when the closure element 226 is in the closed position. It has mechanical strength that can be accessed by the operator.

  For this purpose, the distance between the upper side of the closing element 226 in one closed position and the lower edge of the vehicle body 102 transported by the transport device 104 is from about 1.5 m to about 2 m.

  Since the closure element 226 is accessible in the closed position, there is no need to provide a separate normal passage grid that delimits the bottom of the application area 108 of the paint cabin 110.

  As already mentioned, the exhaust stream 120 can continue to flow through the closure element 226 in the closed position. However, since the closure element 226 constitutes a significantly higher flow resistance than the unclosed contraction 140, the volume flow through the closure element 226 is the volume through the unclosed section 140 a of the contraction 140. Much smaller than the flow rate.

  Precoat material or wet paint overspray coming from the lower section 138 of the flow chamber 128 is filtered by the filter element 230 of the closure element 226 during the closure phase and cannot enter the application area 108.

  The wet paint overspray coming from the upper section 136 of the flow chamber 128 is filtered by the filter element 230 of the closure element 226 during the closure phase and cannot reach the surface of the surface filter 170.

  Thus, during the closure phase, the renewable surface filter 170 can be cleaned (or cleaned) without precoat material, and the wet paint overspray removed by cleaning can pass upward from the lower section 138 of the flow chamber 128. Or, wet paint overspray can pass down from the upper section 136 of the flow chamber 128.

  In addition, the closure element 226 may also be precoated with a surface filter 170 and / or a wall delimiting the lower section 138 of the flow chamber 128 made of precoat material by the precoat supply means 144 and / or swirled by the compressed air lance 220. When coated with a precoat material from a receiving container, it can be in a closed position. Similarly, during such a pre-coating phase, the pre-coating material exits the lower section 138 of the flow chamber 128 and passes upward through the closure element 226 in the closed position toward the interior of the application region 108. I can't do it.

  After the cleaning phase or pre-coating phase is finished, the closing element 226 is returned to the open position by the drive gear 262 driven counterclockwise by the electric motor 260 and, as a result, is fixed there. The upper running part 280 of the toothed belt 266 with the receiving plate 268 is moved to the left, pulling the closure element 226 to the open position (shown in broken lines in FIG. 7).

  The two closure devices 224 for the left section 140a of the contraction 140 and the right section 140b of the contraction 140 can be operated simultaneously or at time intervals.

  In the former case, both sections 140a, 140b of the contraction 140 are closed at the same time, so that the two subsections 138a, 138b of the lower section 138 of the flow chamber 128 are simultaneously cleaned (or cleaned) or pre-coated. I do.

  In the latter case, the sections 140a, 140b of the contraction 140 are closed at different times to perform cleaning or precoating operations at intervals in the two subsections 138a, 138b of the lower section 138 of the flow chamber 128. .

  Instead of a permeable closure element 226 with a filter element 230, a completely closed, airtight closure element can also be used.

  Such a hermetic closure element can comprise, for example, a completely closed metal plate without air passages.

  In this case, each section 140 a, 140 b of the contraction 140 is not completely closed by the closure element 226. In this case, the hermetic closure element is set in the closed position, but in that closed position, each section 140a, 140b of the contraction 140 to be closed is not completely closed, for example from about 500 mm to about 700 mm. A gap that is open in width is left for the passage of the exhaust flow 120 through the constriction 140.

  In this case, because the shrinkage is narrow, the amount of precoat material that passes upward through the shrinkage 140 and the amount of wet paint overspray that passes down through the shrinkage 140 are Substantial reduction is due to partial closure of section 140a or 140b.

  The closure time of the closure device 224 is, for example, from about 2 minutes to about 6 minutes for cleaning and new pre-coating operations, and for example, from about 1 minute to about 2 minutes for intermittent pre-coating operations.

  The second embodiment of the assembly 100 for painting the vehicle body 102 shown in FIG. 11 differs from the first embodiment in that the exhaust duct removes the exhaust from the recirculation air circuit 118 and discharges it to the outside. The only difference is that 192 branches off from the exhaust collection duct 180 located upstream of the recirculation fan 182 and not from the supply duct 186 located downstream of the recirculation fan 182.

  Further, in this embodiment, an exhaust fan 282 is provided in the exhaust duct 192 instead of the exhaust valve 194.

  This configuration has the advantage that the air flow that is directed vertically downward from the top through the application region 108 and the flow chamber 128 can be maintained by the inlet system 196 and the exhaust fan 282 even if the recirculation fan 182 fails. There is. By maintaining such a vertical air flow through the application region 108, particles are prevented from rising from the flow chamber 128 to the application region 108 and contaminating the vehicle body 102 located there.

  Other than this, the structure and function of the second embodiment shown in FIG. 11 are the same as those of the first embodiment shown in FIGS. 1 to 10, and refer to the above description on the assumption thereof. I want to be.

  The third embodiment of the assembly 100 for painting the car body 102 shown in FIG. 12 differs from the first embodiment described above in that the air curtain generator 200 receives fresh air coming from the inlet system 196. The only difference is that clean exhaust, which is not supplied and instead branched from the recirculation fan circuit 118, is supplied.

  For this purpose, the air curtain generator 200 is supplied by a respective branch duct 284 from the recirculation fan 182 and the cooling battery 184 connected behind this to the air chamber 188 above the application area 108. It is connected to the duct 186.

  The control valve 286 is disposed in the branch duct 284, and the control valve 288 is also disposed in the supply duct 186 downstream of the branch duct 284 so that the recirculated air flow is optionally air curtain generating device. While being divided between 200, the air flow passes through the air chamber 188 and the application region 108.

  The control valves 286, 288 are preferably adjusted so that the amount of air passing through the air curtain generator 200 per unit time is from about 5% to about 15% of the amount of air passing through the application region.

  In the present embodiment, the amount of exhaust gas removed from the recirculation air circuit 118 via the exhaust duct 192 having the exhaust valve 194 is supplied to the supply duct 290 that opens to the supply duct 186 downstream of the control valve 288. Via the recirculation air circuit 118 is replaced by fresh air coming from the inlet system 196.

  Embodiments of the present invention do not require an additional exhaust fan.

  Other than this, the structure and function of the third embodiment shown in FIG. 12 are the same as those of the first embodiment shown in FIGS. 1 to 10, and refer to the above description based on this assumption. I want to be.

  The fourth embodiment of the assembly 100 for painting the car body 102 shown in FIG. 13 differs from the third embodiment described above in the exhaust duct 192 that exhausts the exhaust from the recirculation air circuit 118 to the outside. Is different in that an exhaust fan 282 is provided instead of the exhaust valve 194.

  As a result, the air flow that is directed vertically downward through the application region 108 can be maintained by the inlet system 196 and the exhaust fan 282 even if the recirculation fan 182 fails. As a result of this emergency operation, particles, particularly precoat material and wet paint overspray particles, can exit the flow chamber 128 and rise into the application area 108 even when the recirculation fan 182 is in failure. Is prevented.

  Other than this, the structure and function of the fourth embodiment shown in FIG. 13 are the same as those of the third embodiment shown in FIG. 12, and the above description should be referred to based on this assumption.

  In the fifth embodiment of the assembly 100 for painting the car body 102 shown in FIGS. 14-17, the exhaust stream 120 flows directly into the renewable surface filter 170 of the separator 168 after passing through the constriction 140. This is not possible, and the filter element 172 of the surface filter 170 is different from the first embodiment in that it is protected by the cover 292 from the direct inflow of the exhaust flow 120.

  In the present embodiment, the exhaust flow 120 must first flow downward along the vertical side wall 294 of such a cover 292, thereby causing the lower edge of the cover 292 and the upper side of the precoat receiving container 212 to flow. A narrow region 296 between the edges can be passed in a substantially horizontal direction to the filter element 172 of the renewable surface filter 170.

  Within the lower edge of each cover 292 facing the filter element 172 is an additional lower precoat supply means 298, each serving to provide the filter element 172 with a protective layer of precoat material.

  In the present embodiment, the precoat supply means 144 integrated into the flow guide element 132 simply coats the lateral boundary walls of the lower section 138 of the flow chamber 128 with precoat material and exhausts these surfaces to the exhaust. It only serves to protect wet paint overspray from stream 120 from depositing.

  The horizontal cover wall 300 of each cover 292 is respectively disposed below the associated flow guide element 132, the closed element 226 in the closed position, and above the respective filter element 172, so that the exhaust flow 120 is from above. , Directly flowing into the filter element 172 is prevented.

  A narrow region 296 between one cover 292 and the opening 214 of the other precoat receiving container 212 has a vertical extent in the range of about 150 mm to about 200 mm.

  The average flow velocity of the exhaust stream 120 through the narrow area 296 is in the range of up to about 10 m / s. As a result of this fast flow rate, in practice, the precoat material cannot exit the interior of the cover 292 and pass upward, against the main flow direction of the exhaust stream 120. Thus, in the interior surrounded by the cover 292, the lower precoat supply means without the shrinking part 140, which must be closed by the closing means 224 for this purpose, the cleaning operation of the surface filter 170 and the new precoating operation. 298 can be performed at short time intervals (for example, every 5 minutes).

  If the surface filter module comprises, for example, 10 filter elements and one of the filter elements is cleaned every 5 minutes, each filter element is cleaned about every 50 minutes.

  Furthermore, in the fifth embodiment, the filter element 172 is particularly well protected from clogging by wet paint overspray, in particular by the cover 292.

  In an embodiment of the invention, the sections 140a, 140b of the contraction 140 are simply closed (simultaneously or at a time) and in the lower section 139 of the flow chamber 128, in the lower section 138 of the flow chamber 128. The pre-coating operation of the lateral boundary wall is performed by the upper pre-coat supply means 144 and / or by swirling the pre-coat material from the pre-coat receiving container 212 with the compressed air lance 220, but these During operation, precoat material does not exit the lower section 138 of the flow chamber 129 and flow into the application area 108 or wet paint overspray does not leave the application area 108 and flow into the lower section 138 of the flow chamber 128 .

  Other than this, the structure and function of the fifth embodiment shown in FIGS. 14 to 17 are the same as those of the first embodiment shown in FIG. 1 and FIG. See description.

FIG. 1 is a schematic vertical cross-sectional view of a first embodiment of a paint cabin having an apparatus for separating wet paint overspray from an exhaust stream containing overspray particles disposed underneath it. Two separation devices for separating from the exhaust stream, two closure devices for intermittent closure of the exhaust flow passages arranged above the separation device, and horizontal on the horizontal flow guide surface It includes two air curtain generators for generating directional air curtains. FIG. 2 is a schematic side view of the assembly of FIG. FIG. 3 is a schematic plan view from above of the assembly of FIGS. FIG. 4 is a schematic perspective representation of the assembly of FIGS. FIG. 5 is a schematic plan view from above of the support structure of the closure element of the closure device of the assembly of FIGS. FIG. 6 is a schematic vertical sectional view of the closure element of the closure device of the assembly of FIGS. FIG. 7 is a schematic side view of the closure device of the assembly of FIGS. FIG. 8 is a schematic diagram of a vertical cross section of the precoat storage container. FIG. 9 is a schematic cross-sectional view of an injector of a precoat material. FIG. 10 is a schematic representation of the circulating air circuit of the assembly of FIGS. 1-4, where fresh air is supplied to the air curtain generator and exhaust is exhausted from the circulating air circuit via an exhaust valve. FIG. 11 is a schematic representation of an alternative circulating air circuit where exhaust is exhausted from the circulating air circuit by an exhaust fan. FIG. 12 is a schematic representation of the circulating air circuit, where the cooled exhaust is supplied to the air curtain generator, and the exhaust is exhausted from the circulating circuit via the exhaust valve. FIG. 13 is a schematic representation of an alternative circulating air circuit where exhaust is exhausted from the circulating air circuit by an exhaust fan. FIG. 14 is a schematic view in a vertical cross section of a second embodiment of a paint cabin having a device for separating wet paint overspray from an exhaust stream containing overspray particles disposed below it; Creates a transverse air curtain configuration along two flow guide surfaces, two separation devices for separating the exhaust flow from the exhaust flow, two closing means for intermittently closing the flow path of the exhaust flow Two air curtain generators and respective covers for the separators, each cover for generating a constricted region in the flow path of the exhaust flow between the respective closure devices and the respective separators Including. FIG. 15 is a schematic side view of the assembly of FIG. FIG. 16 is a schematic plan view from above of the assembly of FIGS. FIG. 17 is a schematic perspective representation of the assembly of FIGS.

Claims (40)

An apparatus for separating wet paint overspray from an exhaust stream (120) containing overspray particles,
The excess spray particles flow into the exhaust stream (120) at the application area (108) of the paint assembly (100);
The apparatus (126) comprises at least one separator (168) that separates the excess spray from at least a portion of the exhaust stream (120);
The apparatus (126) comprises a flow chamber (128) divided into a plurality of sections (136, 138) by at least one flow guide element (132) and disposed below the application region (108), at least One separation device (168) is provided in one of the sections (138);
The device (126) is at least one for generating an air curtain on a wall surface that delimits the flow path of the exhaust flow (120) and is disposed on the at least one flow guide element (132). An apparatus comprising two air curtain generators (200).   The amount of air corresponding to about 10% to about 30% of the amount of exhaust emitted from the application region (108) is supplied to the exhaust stream (120) by one or more air curtain generators (200). The apparatus according to claim 1, wherein the apparatus is characterized.   Device according to claim 1 or 2, characterized in that the air supplied by the air curtain generator (200) is cooled.   Apparatus according to any one of claims 1 to 3, characterized in that fresh air is supplied by the air curtain generator (200).   The device according to any one of claims 1 to 4, characterized in that the cleaned exhaust is supplied by the air curtain generator (200).   6. A device according to any one of the preceding claims, wherein the wall surface protected by the air curtain is oriented substantially horizontally.   The wall surface protected by the air curtain defines a lateral extent of the contraction (140) in the flow path of the exhaust flow (120) from the application area (108) to the separation device (168), 7. The device according to claim 1, wherein the device is a flow guide surface.   8. A device according to claim 7, characterized in that the central flow direction of the air curtain is directed towards the contraction (140).   9. Device according to claim 7 or 8, characterized in that the contraction (140) can be at least partially closed by a closure device (224).   The device (126) includes at least one closure device (14) capable of intermittently and at least partially closing the flow path of the exhaust stream (120) from the application region (108) to the separation device (168). 224). A device according to any one of the preceding claims.   The closure device (224) includes at least one closure element (226) and the closure element (226) entering a flow path of the exhaust stream (120) to a closed position, and the flow of the exhaust stream (120). Device according to claim 10, characterized in that it comprises a moving device (258) that can be moved out of the way into the open position.   12. The device according to claim 11, wherein the closure element (226) is configured to be substantially airtight.   Device according to claim 12, characterized in that the closure element (226) comprises a sheet metal plate.   The closure element (226) can be in a closed position, which covers up to about 80% of the cross section through which the exhaust flow flows when the closure element (226) is in the open position. The apparatus according to claim 12 or 13.   12. Device according to claim 11, characterized in that the closure element (226) comprises a permeable filter element (230).   16. The device according to claim 15, wherein the closure element (226) comprises a support structure (228) on which the filter element (230) is held.   The apparatus of claim 16, wherein the filter element (230) is held on the support structure (228) by a clamping device (242).   18. Device according to claim 16 or 17, characterized in that the support structure (228) has air passages (234) arranged in a honeycomb configuration.   19. Device according to any one of claims 16 to 18, characterized in that the support structure (228) is made of a metallic material.   20. Device according to any one of claims 11 to 19, characterized in that the moving device (258) comprises at least one guide rail (272) for guiding the closure element (226).   21. The moving device (258) comprises an electric, hydraulic or pneumatic drive mechanism (260) for the closure element (226). apparatus.   Device according to any one of claims 11 to 21, characterized in that the moving device (258) comprises a circulating transport element, in particular a chain or a toothed belt (226).   23. Device according to any one of claims 11 to 22, characterized in that the closure element (226) when in the closed position is accessible by an operator.   The coating object (102) is transported through the application area (108) by transport means (104), and is located above the closing element (226) when in the closed position and below the coating object (102). 24. The apparatus of claim 23, wherein the vertical spacing between them is a maximum of about 2 m.   25. A device according to any one of claims 11 to 24, wherein the device (126) comprises a support element (142) for supporting the closure element (226) in the closed position.   26. A device according to any one of claims 11 to 25, characterized in that, in the open position, the closure element (226) is arranged below the flow guide element (132) of the device (126). apparatus.   27. Apparatus according to any one of claims 1 to 26, wherein the separation device (168) comprises at least one renewable surface filter (170).   The apparatus (126) comprises at least one precoat supply means (144, 298) for discharging precoat material to the exhaust stream (120) downstream of the closure device (224). 28. Apparatus according to any one of 1 to 27.   29. Discharge of the precoat material into the exhaust stream (120) occurs when the closure device (224) at least partially closes the flow path of the exhaust stream (120). The device described.   30. The flow path of the exhaust stream (120) from the closure device (224) to the separation device (168) has at least one constricted region (296). The apparatus as described in any one of.   31. The apparatus of claim 30, wherein the central flow direction of the exhaust stream (120) is oriented substantially horizontally while passing through the constricted region (296).   The apparatus (126) comprises at least one precoat supply means (298) for discharging precoat material to the exhaust stream (120) downstream of the contracted region (296). Item 30. The apparatus according to Item 30 or 31.   33. Apparatus according to any one of the preceding claims, wherein the apparatus (126) comprises at least one receiving container (212) for used precoat material.   34. Device according to claim 33, characterized in that the receiving container (212) is arranged below the separating device (168) and / or below the closing device (224).   35. Apparatus according to claim 33 or 34, wherein the receiving container (212) is connected to a precoat containment container (148) by a precoat discharge duct (222).   36. The at least one precoat containment vessel (148) is connected to at least one precoat supply device (144, 298) for discharging precoat material into the exhaust stream (120). The device according to any one of the above.   The apparatus (126) includes at least one compressed air nozzle (12) capable of transporting the precoat material contained in the receiving vessel (212) from the receiving vessel (212) to the flow path of the exhaust stream (120). The device according to any one of claims 33 to 36, comprising: 220).   The device (126) has a recirculation air circuit (118) in which the exhaust stream (120) separating the wet paint overspray is again at least partially supplied to the application area (108). 38. Apparatus according to any one of claims 1 to 37, characterized in that An assembly for painting an object, in particular a car body (102),
At least one paint cabin (110) and at least one device (126) for separating wet paint overspray from an exhaust stream (120) comprising overspray particles according to any one of claims 1-38. An assembly comprising: A method for separating wet paint overspray from an exhaust stream (120) containing overspray particles, comprising:
In the method wherein the overspray particles flow into the exhaust stream (120) at the application area (108) of the paint assembly (100), the method comprises:
A section of the flow chamber (128), wherein the overspray is disposed below the application area (108) and divided into a plurality of sections (136, 138) by at least one flow guide element (132). Separating from at least a portion of the exhaust stream (120) by a separation device (168) disposed at (138);
Demarcating the flow path of the exhaust flow (120) and generating an air curtain at a wall surface disposed on the at least one flow guide element (132). .

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